Main Microphone - LG CU575 Service Manual

4.18 Main microphone

U303(MIC) → R834,C837 → MIC1P(MSM6260)
Make a call
MIC_BIAS
is 1.8V
Make sound to MIC
Sine wave appears at
C837 ?
END
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Only for training and service purposes
Start
NO
YES
NO
YES
YES
4. TROUBLE SHOOTING
Change main board
Change the MIC
Work well?
- 101 -
NO
Change the
main board
LGE Internal Use Only